Currently, I upgraded my door and rear speakers with the following setup. Honestly, I should have purchased a 6.5" component system for the front with 6.5 subwoofer(s) in the rear for clean sound and setup:

Since I have the rockford fosgate speakers installed and sound is decent, I am looking into purchasing a 12" subwoofer for a little more bass. I am indecisive about going with an all-in-one unit or going with a sub, box, and amplifier setup. With this said, what are your guys thoughts about the following 2 setups I am looking into: